I would not suggest a graphic box, but something like
This is made up of Button Boxes and Text Boxes. The Button Boxes allow you to have a script behind each one that will allow you to do the selections you want, and the empty button boxes allow the backgrounds to have colors set.
Names Default To Here( 1 );
nw = New Window( "Select",
Lineup Box( N Col( 3 ),
Spacer Box( size( 100, 1 ) ),
cbb1 = Button Box( "C1" ),
cbb2 = Button Box( "C2" ),
Button Box( "R1" ),
rtb11 = Text Box( " " ),
rtb21 = Text Box( " " ),
Button Box( "R2" ),
rtb12 = Text Box( " " ),
rtb22 = Text Box( " " ),
Button Box( "R3" ),
rtb13 = Text Box( " " ),
rtb23 = Text Box( " " )
)
);
rtb11 << background color( "red" );
rtb21 << background color( "green" );
rtb12 << background color( "light red" );
rtb22 << background color( "light green" );
rtb13 << background color( "dark red" );
rtb23 << background color( "dark green" );
Jim